K18 Biomimetic Hairscience Leave-In Molecular Repair Hair Mask
Revolutionary leave-in with patented K18PEPTIDE that actually reconnects broken keratin chains (clinically proven). However, formula contains TWO drying alcohols (Alcohol Denat. and Isopropyl Alcohol) to help peptide penetration, and 4 fragrance allergens. The peptide technology is impressive but the vehicle is not the cleanest. Worth the premium price for severely damaged hair. Use sparingly - a little goes a long way. NO MI/MCI.
Quick Description
K18 Biomimetic Hairscience Leave-In Molecular Repair Hair Mask is a mask crafted by K18 to keep scalp and hair balanced. It is designed for everyday use and aims to leave hair feeling refreshed and lightweight. The formula features key ingredients selected to cleanse, support scalp comfort, and maintain a clean finish. Ideal for users wanting a thorough yet considerate cleanse with a focus on clarity.
Ingredient Overview
Highlights
Key Ingredients
Base solvent
Drying alcohol - helps peptide penetration but can dry hair
Penetration enhancer for active delivery
Fatty alcohol for conditioning
Lightweight emollient
Emollient and texture agent
Ingredient Table
| Ingredient | Details | Rating |
|---|---|---|
| Water |
Base solvent Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Good |
| Alcohol Denat. |
Drying alcohol - helps peptide penetration but can dry hair Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Moderate |
| Propylene Glycol |
Penetration enhancer for active delivery Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Moderate |
| Cetearyl Alcohol |
Fatty alcohol for conditioning Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Good |
| Dicaprylyl Ether |
Lightweight emollient Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Good |
| Cetyl Esters |
Emollient and texture agent Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Good |
| Behentrimonium Chloride |
Conditioning quaternary Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Good |
| sh-Oligopeptide-78 (K18PEPTIDE) |
Patented bioactive peptide that reconnects broken keratin chains - clinically proven Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Good |
| Hydrolyzed Wheat Protein |
Strengthening protein Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Good |
| Hydrolyzed Wheat Starch |
Conditioning starch derivative Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Good |
| Tocopherol |
Vitamin E antioxidant Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Good |
| Isopropyl Alcohol |
Drying alcohol solvent Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Moderate |
| Fragrance |
Added scent Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Moderate |
| Geraniol |
Fragrance allergen Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Moderate |
| Linalool |
Fragrance allergen Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Moderate |
| Hexyl Cinnamal |
Fragrance allergen Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Moderate |
| Benzyl Alcohol |
Fragrance/preservative Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Moderate |
| Phenoxyethanol |
Safe preservative Further: helps keep sebum and buildup in check, improves sensory slip, and stabilizes the formula across repeated washes.
|
Moderate |
Explanation of Key Groups
Surfactants
Primary and co-surfactants (e.g., Sodium Laureth Sulfate, Coco/Ampho betaines) provide the cleanse, foam, and removal of scalp oils. Mild co-surfactants help soften the feel and improve tolerance.
Clay Minerals
Clays like kaolin, bentonite, or montmorillonite absorb excess sebum and impurities, contributing to a fresher, balanced scalp feel without heavy residue.
Actives
Ingredients such as salicylic acid or zinc derivatives can support gentle exfoliation and sebum regulation, helping keep follicles clear and comfortable.
Humectants
Water-binding agents (e.g., glycerin, hyaluronate) attract moisture to reduce the stripped feel after cleansing and keep lengths softer.
Safety Notes & Allergens
- Fragrance allergens (e.g., linalool, geraniol, coumarin) may be present if fragrance is listed.
- Colorants (CI numbers or named dyes) are aesthetic only; skip if you react to synthetic dyes.
- Potential irritation: strong surfactants and fragrance allergens can bother very sensitive scalps.
- If you have fragrance allergies or highly reactive skin, patch test before full use.
Summary
Best suited for users seeking a clear, balanced cleanse. It effectively targets buildup with its surfactant system and supporting actives, while maintaining a light feel on the hair. Be mindful of surfactant strength, fragrance presence, and any colorants if you are sensitive.
Who is this product good for?
- ✓ People wanting a refreshing cleanse with balanced oil control
- ✓ Those comfortable with light fragrance in haircare
- ⚠ Very sensitive scalps should monitor for fragrance or surfactant irritation